There are developers here of all sorts, but for those of you that do this professionally and more specifically freelance, what do you charge? I know typically with estimates you try to get an idea of the time involved and then multiply by a wage rate. In many cases, there is probably the aspect of competition and industry standards that define the scope of what you could actually charge and successfully be hired. Does anyone have a good starting point? My situation is a little unique- I've already developed a database "in-house" for a small financial company, but I'm actually in the process of changing jobs and they asked me for a price for another database that I could do in my spare time. I'm hesitant to just throw out a price, because I tend to undervalue my work.

Any help or direction would be appreciated/useful.